Power punching press



Je 11,1929. o. s. BEYER 1,716,414

' POWER PUNCHING PRESS- Filed Jan- 17 1927 5 Sheets-Sheet l INVENTOR a vBy Attorneys,

June 11, 1929. o. s. BEYER 316,414

POWER PUNCHING PRESS Filed Jan. 17, 1927 s Sheets-Sheet 3 w w W m2 Fw... MM 1 f v y 472* a B (\A @ik @Z Patented June 11, 1929.

, UNITED STATE! OFFICE.

OTTO S. BEYER, OF BROOKLYN, NEW YORK, ASSIGNOR T E. W. BLISS COMPANY, OF

NEW YORK, N. Y., A CORPORATION OF DELAWARE. L

POWER PUNOHING IPRE SS.

Application filed January 17, 1921. ei'ial No. 161,617.

This invention relates to presses for punching, embossing, or other workon metal or other material, and is designed to provide a press capableof operating at high speed 5 and doing heavy work. i

The invention is embodied in a press hav ing a relatively short strokeand capable (with a suitable automatic feeding mecha the line '11 inFigs. 2 and 4, and the portion below that line being in the plane of theline 1*1 in those figures. i

Fig. 2 is a side elevation of the'lower part of the press, the upperpart being a vertical transverse mid-section in the plane lines 2-2 inFigs. 1,3 and 4.

Fig. 3 is a horizontal section, partly in plan, the sectionalportionbeing in the planes of the lines 3-3 in Figs. 1 and 2.

Fig. 4 is a horizontal section taken mainly in the plane of the line 4-4in Fig. 2, but the plunger being in the plane of the line 44: in Fig.5.

Figs. 5 and 6 are side and front elevations of the plunger. V

Figs. 7 and 8 are a side elevation'and plan of the saddle.

Figs. 9 and 10 are a plan and side elevation of the saddlerest or pad.

The specific machine shown in the drawings has a main frame comprising abase A supported uponv a sub-base or pedestal B, and supporting a bed C,an open uprlght frame D, and a press head E.- The parts A, D, E are tiedtogether by four tie rods F which pass through them and .have nuts ontheir ends. This construction of frame is convenient, butnot essential.v

The presshead E supportsa power shaft G, the middle portionof which isreduced, as shown in Fig. 1, to form an eccentric g. Thev shaft turns inbearing sleeves H H which are housed in a transverse bore in the presshead E; The shaft is driven in any suitablemanner', preferably throughfaclutch of the well-knowntype, from a; flywheel I which is clutched tothe shaft under of the control of a clutch-operating arm 21 operated bya treadle j in the usual and well-understood manner. The fly-wheel I maybe driven in any suitable manner, being shown as formed as a gearmeshing with a pinion I: on theshaft of an electric motor J.

Mot1on is communicated from the eccentr1c g to a punch head K toreciprocate the latter rapidly in vertical direction, so that a punch wecarried by this head and coactmg with a die n supported on the bed C maypunch or otherwise act upon astrip or other sheet of metal or other,material which 1s fed between the punch and die in usual manner. At n isshown the usual stripping plate.

The,means for communicating motion from the eccentric gto the punch headK will now be described. Just over the head K is a plunger L, shownseparately in Figs. 5 and 6. This plunger has a widely extended foot orbase flange is which is bolted to the head K by screws 6 b (Fig. 4) andit has a tubular sliding portion Z which slides. within a vertlcal bore30 in the press head E. It is preferable to make the sliding portion Zand the bore p cylindrical. The sliding portion Z is cut through at g toform opposite openings which afford a clear space for the passage of theshaft G, and also preferably permit partial entry of its bearingbushings H. These bushings are utilized to guide the slide Z and preventits executing any rotary movement on 1ts vertical axis; and for thispurpose the ends of these bushings are made square, so that theyterminate in parallel vertical planes where they abut against thesurface portlons r forming the margins of the openings g, this abutmentbeing clearly shown in .Fig. 3, and thereby a vertical slideway or guideis formed which restrains the plunger to an upright sliding movementwithout possibility of turning. Engaging the underside rately in Figs.and 8. This saddle rests upon asupport or pad P shown separately inFigs. 9-a nd v10, and which constitutes essenof the eccentric is asaddle M, shown sepatially a part of the plunger L, butis fonconveniencemade separate therefrom. Between I specttothe plunger; this adjustmentis best "afforded: by: meansof. a wedge s introduced j between the padand plunger, as 1 shown in through an'opening u in the lower partof theplunger, best shown in Fig. 6.

The upstroke of the punch head is effected by retracting springs Q Qwhich may be arranged in any convenient manner. Preferably they aremounted on the press head E, and for compactness are dropped intorecesses in that head, as shown in Figs. 2' and 3. Each of the springs Qis shown as comrisin two com ression s rin s of e ual' stress, onenested within the other according to a well-known construction, andexerting an upward stress on rods R R which oxtend down through thesprings and through openings in the head, and are fastened at their.lower ends to the base flange 7c of the plunger L, as shown in Fig. 2.The springs are preferably enclosed in tubular casings v.

The punch head K requires to be accurately guided in its verticalmovement, and this in the construction illustrated is accomplished bygiving it a sliding engagement with four fixed studs T T fastened in thebed C and projecting upwardly therefrom, as shown in Fig. 2, and havingsliding engagement with bushings w fixed in the headK, as shown inFig. 1. The studs T T are spaced widely apart so as to be nearly alignedwith the posts D D and rods F F, whereby to leave. a wide space betweenthem for giving access to the punch and die. In operation the rotationof the eccentric imparts an oscillating motion to the saddle M,-which isfree to slideon the pad P. As the eccentric center descends, thedownward movement is transmitted through the saddle and pad to the pluner and punch head. The lateral movement o the eccentric is imparted tothe saddle, which slides laterally on to of the pad P. The returnorupstroke is e feeted y' the stress of the spring Q Q. The constructionis such that 'WIth a short stroke an extremely rapid reciprocationma beim.- parted to the-punch head, 'so that .t e press may be driven at highspeed. The machine is very compact and amply strong forhea work. Thepunch head affords a dire application 0 .the working pressure- The,capacity for high speed is due to the minimiziing of size and weight ofthe reciprocating parts. This reduces the mass of the" parts to bedriven through the clutch, and relieves the clutch of thesevere shockofstarting 'a heavy press, which-of itself enables a higherstartingspeed to be-iniparted. Thel'punch head isadeq'uat'ely guided by thefixed studs",

T, which give accurate .ali' ment, and avpid the weight of the long sliing head, moving in prolonged vertical slidew' ays, heretoforecommonly ued The invention may be modified in its-mechanical details, itsconstruction being v'ariable in accordance with the work to beperformed, and within the scope of the appended claims.

What I claim is:

1. 'A power pressof the described type comprising a frame, an uprightcylindrical tubular slide having bearings in said frame above and belowthe driving shaft, the driving shaft intersecting said slide havingbearings in the frame on opposite sides of the slide, and having aneccentric within the slide, a punchhead carried by the slide, meanswithin the slide for communicating motion from said eccentric to thepunch-head, and yielding means for drawing the punch-head upwardly.

2. A power press according to claim 1, the

punch-head located beneath the slide and proing portions of thepunch-head.

3'. A power press comprising a fixed frame having an upright cylindricalslideway, an upright tubular slide movablev in said slideway, atransverse shaft intersecting said slide, having bearings in said frame,the slide having bearings above and below the shaft, :1 punch-head.attached beneath said slide, up-

right guiding means for preventing rotative displacement of said slide,and means Wlthlllthe slide for communicating motion from said shaft tothe punchhead.

4. A power press comprising-a fixed frame having a vertical cylindricalslideway, a plunger having a cylindrical portion working in saidslideway, and having guiding faces in vertical planes intersecting itscylindrical portion, a transverse shaft, and bearing bushings for ,saidshaft within said fixed frame, the ends of said bushings engaging saidguiding faces to prevent rotary dis a said plun er, and a punch-heacarried beneath sai plunger.

5. A press of the described type comprising a shaft having an eccentric,a vertically shaft intersecting the plunger with its eccen- "tric withinthe plunger, a saddle engagilig the under side of the eccentric, and awithin the plunger supporting said sa dle and communicating the downwardworking cement of moving hollow plunger and punch-head, the

thrust therefrom to the plunger and punchhead, with means between thepad and punch-.

head for adjusting the relation of the pad and punch-head whereby to setthe latter up or down.

. 6. A press according to claim 5, with a wedge between-said pad andpunch-head, and means for adj usting such wedge whereby to vary tlrerelation between the pad-and punch.- head to set the latter up or down.

7. A press comprising an upright lunger provided with a tubular slidemovab e on its vertical axis, anupright frame symmetricalinane I I i 0 II I i with said axls, comprlsing a bed, four uprights thereon, and ahead above said uprights, said head having an upright slideway for saidslide, and havingtransverse hearings on opposite sides of the slide,a'horizontal shaft in said bearings having an eccentric within theslide, a punch-head carried by the plunger below the head, and meanswithin the tubular slide for communicating motion from the eccentric tothe-slide.

8. A press comprising an uprighttubular slide movable on its verticalaxis, an upright frame symmetrical with said axis, having an uprightslideway for said slide, and having transversebearings on opposite sidesof the slide, a horizontal shaft in said bearings having within theslide an eccentric wholly within the radius of the shaft so that theshaft may be removed endwise from its bearings, and means within thetubular slide for comnlounicating motion from the eccentric to the side.

9. A press according to claim 8, the frame having bushings seated withinits head forming said bearings.

10. A press according to'olaim' 8, the means for communicating motioncomprising a saddle engaging the lower half of the eccentric and movablewithin the hollow of the tubular slide, in horizontal directionrelatively to the slide. w

11. A press according, to claim 7, the punch-headworking between twopairs "of said uprights.

12. A power press having a fixed vertical frame transversely bored forreceiving shaft bushings in said transverse bore on opposite sides ofsaid slide, a shaft passing through the slide, having hearings in saidbushings, and having between said bushings an eccentric of smallerdiameter than the shaft, the slide enclosing said eccentric, and meanswithin the slide for. communicating motion from the eccentric to theslide, whereby the shaft is removable endwise through a bushing and theslide has guiding hearings on both sides of its connection with theeccentric. In witness whereof, I have hereunto signed OTTO s. BEYER.

